561266760 has 64 divisors (see below), whose sum is σ = 1688918400. Its totient is φ = 149216256.

The previous prime is 561266743. The next prime is 561266777. The reversal of 561266760 is 67662165.

It is an interprime number because it is at equal distance from previous prime (561266743) and next prime (561266777).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33501 + ... + 47379.

It is an arithmetic number, because the mean of its divisors is an integer number (26389350).

Almost surely, 2^561266760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561266760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844459200).

561266760 is an abundant number, since it is smaller than the sum of its proper divisors (1127651640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561266760 is a wasteful number, since it uses less digits than its factorization.

561266760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14230 (or 14226 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 561266760 is about 23691.0692033939. The cubic root of 561266760 is about 824.8781013652.

The spelling of 561266760 in words is "five hundred sixty-one million, two hundred sixty-six thousand, seven hundred sixty".